How are coordinate plane quadrants numbered?

The coordinate plane, also known as the Cartesian plane, is divided into four quadrants, and they are numbered as follows:

The first quadrant (Quadrant I): This quadrant is located in the upper right-hand corner of the plane. It contains all points with positive x-coordinates and positive y-coordinates. In other words, the x-values are greater than zero, and the y-values are greater than zero.

The second quadrant (Quadrant II): This quadrant is located in the upper left-hand corner of the plane. It contains all points with negative x-coordinates and positive y-coordinates. In other words, the x-values are less than zero, and the y-values are greater than zero.

The third quadrant (Quadrant III): This quadrant is located in the lower left-hand corner of the plane. It contains all points with negative x-coordinates and negative y-coordinates. In other words, both the x-values and the y-values are less than zero.

The fourth quadrant (Quadrant IV): This quadrant is located in the lower right-hand corner of the plane. It contains all points with positive x-coordinates and negative y-coordinates. In other words, the x-values are greater than zero, and the y-values are less than zero.

These quadrant labels are used to specify the location of points or graph equations in the coordinate plane, which is a fundamental concept in algebra and geometry.